My advice is simply do not create variables on the fly. What you should be doing is using a hash:

my %data;

foreach my $line (@data)
{
     my ($timestamp, $page, $moredata) = split('|', $line);
     my @hits = localtime($timestamp);

     $data{$page} = [0,0,0,0];

     $data{$page}[0]++ if ($hits[7] == $now[7]);
     # ... (etc)
}
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This is a lot more practical than having legions of separate variables.